<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div class="box">
        <div class="left">111</div>
        <div class="right">222</div>
    </div>
</body>
</html><script src="https://cdn.bootcdn.net/ajax/libs/react/18.0.0-alpha-6f3fcbd6f-20210730/cjs/react-jsx-dev-runtime.development.js"></script>
<script>
   var v = '1111';
   (function IIFE(global){
    console.log(global,'windowObject')
    
   })(window)      

    let $ = document.querySelector.bind(document);
    let leftNode = $('.left');
    let rightNode = $('.right');
    leftNode.onclick = function(){
        console.log(111111111111);
    }
    console.log(leftNode,rightNode,'_______+');
</script>